When the allied army had left the vicinity of the Douro, General Clauzel advanced with the French troops which had been defeated at Salamanca, and occupied Valladolid, and Major-General Anson's brigade was withdrawn across the Douro at Tudela in the middle of August, when the TWELFTH had one man killed in a skirmish with the French. On the return of the army from Madrid, the French retreated; the British moved forward, and on the 7th of September the TWELFTH Light Dragoons entered Valladolid, and skirmished with the enemy's rear-guard when the bridge was blown up. Leaving Valladolid the French army retired down the beautiful Pisuerga and Arlanzan valleys; the allies followed, and the ground being favorable for a retiring army, repeated skirmishes took place, in which the TWELFTH Light Dragoons were engaged. Arriving at _Burgos_, the capital of Old Castille, the army halted, and commenced the siege of the castle; the cavalry being pushed forward to _Monasterio_, where the TWELFTH Light Dragoons had frequent skirmishes with parties of the enemy. The French army having been reinforced and placed under the orders of General Souham, advanced upon Burgos; and this circumstance, with the movements of the forces under Joseph Buonaparte and Marshal Soult, induced the British commander to raise the siege of Burgos castle, and to retire. During the retreat from Burgos to Ciudad Rodrigo, the TWELFTH Light Dragoons were actively employed in covering the rear, and they had frequent rencontres with the French advance-guards, on one of which occasions their commanding officer, Lieut.-Colonel the Honorable Frederick Ponsonby, was wounded; Lieutenant Taylor was also wounded; and the regiment had several private soldiers and horses killed and wounded. After passing the Agueda the army went into quarters; the TWELFTH Light Dragoons were stationed at Oliveira de Condé; and from the period they had taken the field in June, they reckoned thirty-three skirmishes and one general engagement, in which the regiment, or a portion of it, had taken part. [Sidenote: 1813]